Here's what I'd like to do when I'm in my car, with my phone in a dash mount, connected via bluetooth to my car hands-free: Press a shortcut on my phone's screen to switch on the car's microphone, then start a SoundAbout voice search session, then turn off the car's microphone when I'm done with the voice search.

The only way I can see to do it is if I leave the microphone override on all the time. But that eliminates the possibility of listening to the car radio.

One suggestion to help newbies like me: I had already read the post you linked to, but I didn't understand that clicking the Soundabout Voice Search icon would redirect the microphone input from the bluetooth hands-free, since you only mention audio output in that post. It might be helpful to add something like this:

10] Then use the Soundabout Voice Search Shortcut to initiate a voice search. That will turn on the hands-free microphone for the voice search.